101399026580 has 24 divisors (see below), whose sum is σ = 212949592800. Its totient is φ = 40557394080.

The previous prime is 101399026579. The next prime is 101399026627. The reversal of 101399026580 is 85620993101.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265295 + ... + 522665.

It is an arithmetic number, because the mean of its divisors is an integer number (8872899700).

Almost surely, 2^101399026580 is an apocalyptic number.

101399026580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101399026580 is an abundant number, since it is smaller than the sum of its proper divisors (111550566220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101399026580 is a wasteful number, since it uses less digits than its factorization.

101399026580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277079 (or 277077 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 44.

The spelling of 101399026580 in words is "one hundred one billion, three hundred ninety-nine million, twenty-six thousand, five hundred eighty".